Automatic revolving dump



E. J. BEST.

AUTOMATIC REVOLVING DUMP.

APPLICATION FILED JULY 14,1919.

Patented Aug. 8, 1922.

4 SHEETS-SHEET l.

Ill Ill 1 E. J. BEST.

AUTOMATIC REVOLVING DUMP.

APPLICATION FILED JULY I4, 1919.

Patented Au. 8, 1922.

4 SHEETS-SHEET 2.

W; hum M f i E. 1. BEST. AUTOMATIC REVOLVING DUMP". APPLICATION FILED JU{. Y 14,1919.

1A3 7 Patented; Aug. 8,1922,

4 SHEETS-SHEET 3.

E. J. BEST.

AUTOMATIC REVOLVING DUMP. APPLICATION FILED JULY 14,1919.

1 A2437 1 Patented Aug. 8, 1922.

4 SHEETS-SHEET 4- 1 21i ew NU/bums the dump after each rotary movement.

eaten nnw n mnns'r, or woonwaian, ALABAMA.

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'specificatifin MM-M- atentecl Aug. 8, 1922 Application fi1e .v mew Sal nas- ,810.-

certain new anduseful Improvements inan Automatic Revolving Dump, of which the following is a specification.-

My invention relates to an automatic revolving dump or sidetippleadaptedto receive cars singly or in multiple andldump them with a complete revolution Ol if deipelfts which are hereinafter more fully 19- Ql'll d' l POlIlted Outin the accompan ing sired, with apartial revolution andan automatic return to initial position.

The rotary dumps now in use are revolved by a variety of mechanical "appliances, all of which are more or less complicated especially in orderto obtain a shockless stopping of In some instances the track for the mineral has been set off center in the dump [to unbalance it for the purpose of starting the rotation of the dump by grayity,-but inasmuch as the car becomes dumped during the rotation, thus materially modifying the load inthe dump, it has not been. considered prac- I tical heretofore to rely upon the momentum attained by such dump to automatically right itself after a complete or partial rotation.

I have conceived that the power operating mechanism for dumps of this general class can be dispensed with and their automatic operation attained by utilizing the fly-wheel principle to store upsuliicient energyduring the initial movement of the loaded .dump, when it is heavily unbalanced, to supply the needed momentum or energy to restore the unloaded dump with ample margin of safety to its initial position. The fly-wheels in opposing their inertia to the starting movement of the-dump'retard it and slowup its initial momentum, causing it to dump the contained material with less breakage and to operate with less-stresses. Sui-table braking and stopplng means are provided to stop the dump as it rights itself and to hold it during the transfer of the mine cars.

While it is to be understood that the -fiywheels for storing up the requisite energy during the movement of the dump with the load therein may be of any suitable shape and type and ma/y be located at various places on, under or connected to the dump, my preferred arrangement is to add the nec-. .essary weight to the dump supporting trunlar parts throughout the drawings.

.i9 Whe ls so tha ese-are erte n drivi g. hee t ght the 1111 if sf' t dumping operation.

My, in e tion also comp is s novel fe m 5 51 m th d and mechanism. fgr 51- compll hlng h Shockless stoppage of the 1l h m cha m be ng p r icularly designed for joint use witha pair of dumps arranged side by side and adapted the volvein reverse direct-ions.

,. lily invention also comprises other novel det .of onstru ion and arran me 6f claims, and which in their preferredfembodiments are illustrated inthe accom" anyng drawings which form a part this specifica ipn, a d n w ch? if F g. 1 saplan view of a pair of rotary dump cages which are each adapted for the s multaneous dumping of live cars arranged 1n .l. ll. iple therein. i i i ,F g. ,2 is a view taken on the line 2-2 1 ig.- I l; sl wi g one f t dumping cages in side elevation.

F ig. B is'an enlarged view taken on the 11116 3..3 of Fig. 1 with the car in tlledninp' andthe platform shown in .cross section Fig. 1 is an enlarged cross sectional view ,threngh .one of the dumping cages.

5 is a vertical sectional Viewtalgen on the line 55 of 131g. .4: and showing one of therolgled steel tires or rails forming part o thedump .Qee I Fig 6 11, finlarged detail view of one of t trunnion Wh s w th the fly-wheel att aghments.

Fig"? is a view of the stoppage means comprisinga pa r of pawls adapted to engage stoplugs rigidly connected to the tire r a1l v l 8 is a detail viewtalgen on the line 8 8 of Fig. 3 and showing the brake. mechan snr co-acting withthe stop lugs and the y eld ng arrangement for absorbing the shocks of stoppage. I l v FignQis a detail sectional .view on the spning brake clamps taken on theline 9 9 Similar reference numerals -refer.to. si ni- In the prefer-red.,embo,diment of my inven t on illustrated, the two dump cages shawn are duplicates and one only need .thcreforejbe described. ilhis tipple or dump is constructed of metal and comprises a number of rolled steeltires 1 which are made up of rails which after being bent are turned.

true to a perfect circle and serve the double purpose of frame and rolling device. The rails are therefore arranged with their heads or treads facing outwardly and their base flanges facing inwardly; These tire rails (see Fig. 2) extending from tire to tire and forming a construction similar in principle 'to the lattice girder. The cage is preferably made light on account of the automaticgravity dumping features hereinafter described,

but the structural material employed is of sufficient strength to stand, without substantial depreciation, the dumping service under the. most severe operating conditions.

The treads of the rolled steel tires 1 ride 7 on trunnion wheels 4 and 4* (see Fig. 6), the

frame being fitted with short shafts 5 that turn in roller bearings 6 placed at each side of the trunnion'wheels in a pair of bearmg castings 7, the bases of which are mounted on and attached to the transverse supporting beams 8 of the tipple structure. These bearing castings 7 are substantially triangular in side elevation (see Fig. 4), and their top portionsare also suitably bolted to the tipple framework. The fly-wheels!) are suitably connected by keys 10 to the overhung ends of each shaft 5 and. the size and weight of these fly-wheels are arrived at by calculating the fly-wheel load for the required speed, say

average of 10 R. P. M., of the dumping cage and'theloads of the cars to be handled thereing, and from this subtract the fly-wheel effect of the dump. In connection with the operation of the dump I shall state the factors which control in the design ofthese wheels. 1 a

In addition to the tie rails2 I provide a pair of track'rails 11 which extend through eachdump cage, these rails being so placed that they form a run way for the cars to be handled in their respective dump. The rails are supported by transverse structural beams 12 which at their ends are riveted to plates 13 provided with curved marginal angles 14' which are riveted to the tire rails 1. These angles subtend a substantial arc of the tire rail so as to give the requisite load supporting strength and in additionthereto the beam is suitably braced at its center by the angles '15' which areconnected to plates 16 riveted tothe'tire rail. Each track rail 11 rests on the end 17' of a heavy m etal bar 18, which "end is bolted to the beam 12. The bars, be

ginning at points far enough from the rails to clear the cars, are bent vertically and have their upper ends 19 bent horizontally outwardly and'bolted to the top of the plates I 13. I A rail 20 is attached near the top of the .vertical portion of each of these bars and overhangs inwardly so as to project over the wheels or wheel hubs of the cars'standi'ng on the track rails I 11 of the dump, as seen in Fig. 8. These latter rails 20 therefore serve to support the cars in their inverted position. a

My object in mounting the rails 11 and 20 at each side of the track on the same bent bar 18 is to preserve their relative adjustment while adapting them to be adjusted relatively to the center of the cage both vertically and laterally, the lateral adjustment being'made by changing the point of attachment of the ends 17 and119 of the bar to the beam-12 and plate .13 and the vertical ad justment being obtained by the insertion of liners under the ends of the bar.

As illustrated, therotary tippler is arranged so that the" horizontal track for the cars comes in line with the tipple floor 21 .but is off center in the cage, the tracks in the left hand tippler, Fig. 3, being preferably offset to the right and the tracks in the right hand tippler being offset to the left. In order that the tippl'ers, which are thus unbalanced, may be held in position for receiving and discharging. the mine cars 22, I attach to the web of one or all of the tire rails 1 on opposite sides thereof a pair of stops 23. These are more clearly illustrated in Fig. 7 where it will be seen that they have elongated bodies for the reception of a number of rivets and have at their forward ends enlarged heads 24, the outer side edges of which project laterally on each side beyond thetread of the tire rail 1 and flush with the side edges of the base .25 of the rail 1 so that their forward ends will be engaged by the stop jaws 26 of a bifur. cated pawl 27 which straddles thetread of the the rail 1 and hasits ends struck on a curve from its bearing. center. The forward ends of the stop heads 24- are similarly curved. These pawls are provided with bottom extensions/28 which straddle a hear ing 29 in which a. shaft. 30 turns, onwhich v out of operating position by means of a crank arm 32 extending laterally under and beyond. a dump cage and provided with an I operating handle 33 which passes upwardly through the'tipple floor at a point convenient for the operator controlling the dumps. These pawls, dueto their curved ends andthe great leverage obtained by reason of the timber supports.

wee-s71 length of their operating lever 32, can be readily disengaged from the stop lugs'24 so as to release the cages tor the dumping operation.

The main supporting transverse beams 8 of the tipple are braced at their centers by trusses 3t and along on-the centers of these beams rest other longitudinal beams 35 which support overhead a series of spaced short transverse beams 36 which are suitably tied together and'tor n a strong base upon which I mount a spring'support for the stoppage mechanism, which spring support is built up of alternate tiers of longitudinal and transverse boards 87 and 88, respectively, (see Fig.8) which are suitably connected to their supports. The bearing brackets :29 for the stop pawlsareall-mounted on these spring supports and between each adjacent pair of stop bearings 291 mount a vertical standard 4-0 which is pro vided on opposite sides with outwardly and downwardly inclined seats 42. The lower ends of the four pairs of anglesbars 44.- and forming the brake or stoppage mechanism rest on the seats 42 and are adapted to transmit their thrust stresses through the standards at) to their yielding This stoppage means, one of which is preferably provided forthe'opposite tire rails of the two dumps, comprises two pairs of angle irons 4A and 45 with curved braking flanges which conform to the curve of their respective tire mu tread which is disposed betweenthem. Theother flange of each brake angle iron spaced slightly from the tread surface of its respective tire rail 1 and the transverse flanges 4L6 of the two angles are disposed onjopposite sides of the treads of their respec-' tive tire rails, see Fig. 9, and are adapted to receive between them and to frictlonally engage the outer side edges of the heads 24% of theirrespective stop lugs when the latter move into position between them. upper ends the angles at and 45 arebent slightly apart (see Fig. 8) and are suitably attached to an overhead angle plate bolted to the beam l? which suitably supported at its ends by the uprights 4:8. The attachment is such that the units as and 45 of each pair can have their flanges drawn together by the mechanism which will. now be described so as to apply the requisite friction to the stop lugs and thereby to brake the dump cages so as to reduceto minimum the stoppage jar when the stop lugs engage the pawls 27.

As illustrated, I utilize two fasteningsfor' ,each set of braking units 4H and 4:5 for the two dump cages. These mechanisms comprise a screw bolt 49 wh ch passes lengthwise of the dump between the adJacenttire 'rails lan'd between the axially disposed flanges of the angle irons 4:4: and '4t5 as will At their I be seen more clearly in Fig.9. A washer 50 I and a nut'5l on the other end of the bolt will between the washer 52 and a washer o l'held bya nut'56 mounted on the outer end-of the bolt. The flanges of the anglesla and45 are notched at 56 to form seats for the washers 50 and F or the upper fastening, the construction is the same eXce-ptthe space between the angles being greater, plates 57 are substituted for the washers 5O and'52. The springs act to permit the opposite pair of brake angles 44:, 45 to yieldapart as the stop lugs 24 pass between them and their tension is adjusted to engage the stops with the desired friction tonearly bring the dump to rest. The angles 'carry. inturn-ed stop 'lugs39 which are disposed above the upper fastening and limit'the app-roach. of the angles when not in the act of braking the dump. In like manner the lower ends of the angles carry stops ell, which engage the column a0, see Fig. 8, and limit the approach of the lowerends of theangles In order totake the-end thrust frorn'the dump ca 'es andpart-icularlywhen the latvide'end thrust trunnion rollers: 58 which are mounted'to turn inverticalbearings 59 and'which'engage-the side faces at the lower tire ring 1. To avoid dangerwto the dump structure from the cars I provide the several tirerails with outwardly flaring deflector platesGO in radial alignment withthe nearest corner of the cars. These would deflect the car past the tire rails and prevent serious damageto the cage. 1 i

' In operation, a fter the-car or cars'have been delivered to'the dump, thepawls 27 are releasedbyraising the handle 33 andthe weight of the 'ca r-orears andthe material thereinis heavy enough-to cause by gravity automatically the immediate rotation of the "dump. f'The pawls being counterweighted by the lever arm '33 immediately right them-- selves as soon as released and stand in position to prevent the dump from -re-turnfinrgv retard the downward movement of the load.

As the dump moves and :st'artsthe iiy-wheels in motion they act to store-up poweror energy which they give out to drive the cage after its 'gra'vi'tating action*ceasesiuntil it reaches its'norma'l or initial position. :The number of fly-wheels"-woulchbe,in a sense, proportionate to the length of the du'mp and the number ofcars tobe handled thereby at a time, it being preferable-to distribute the 'llO flywheel weight so as to avoid abnormal shaft torsional deflection. My object being to make use of the counterweight principle ..so that it will initially retard the unbalanced dump on its downward movement and will give the power back to the cage for v righting itself, it should .be understood that this counterweight may bedistributed in various manners and at various points on or connected to the cage but should always be designed and located so as to operate with the least coefficient of friction andstrain on the dump cage. As the dump cages in the arrangement shown complete their rotation the stop lugs pass between the braking mechanism and the dump is gradually slowed up until it is brought tova complete to vary the center of gravity of the loaded dump untilthe accumulated momentum derived therefrom works out satisfactorily with the fly-wheel mechanism.

'The center'of gravity of this automatic tippler, cars and load is above the center of rotation, and is sufficiently ofi' center to set the tippler in motion and to continue it in motion until the load is emptied and the tippler has righted itself; it is not designed so that thecars when empty can start the tippler' on any downward movement, as thecenter of gravity of the tipple with empty cars in righted position therein is below-"the center of rotation so that the dump would only tend to rotate responsive to the lateral offset of the car and tracks therein which would not develop suflicientmomentum for operating purposes. The detailed description of operation has, so far, concerned itself with dumps designed to rotate, i. e., after the load falls, the fly wheel weight, wherever distributed, will carry jthe du-mp over 360.

But it should be understood that smaller fly-wheels can also be made to re- 'tard the speedy so that the dump canjrotate the center of gravity of say approx1mate1y2009 in which position opposite side from the originalgposition with the cars loaded, which tends to revolve the [dump in the opposite direction. This i force overcomes the initial momentum of thelighter fly-wheels, which is very slight.

and reverses their; direction of rotationso ;that theywill again right thefdump as it 'swings back in the opposite direction, the

small amount of-power neededfor this end coming out of the energy stored in the flywheels as'the dump startsto swing back ,after reaching'its 200 angle,

While I have, referred to the arrange-v ment of the fly-wheel weight so asto retard gravitetins m Y nt of the l mp as the, cars is at the J my preferredarrangement, I nevertheless contemplate the use of the added fly-wheel weight on the dump when such retarding action'will not be so efieotive as in a driven element.

"This invention is not intended to be re stricted in scope to the specific embodiments claims. 1

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is p a 1. An automatic rotary dump comprising a rotatable cage, means to unbalance the cage, releasable latch means to hold the dump against rotation, when thus unbalanced, and fly-wheel means supportedindependently of and rotatable with the cage, said fly-wheel means being adapted by its inertia to retard the starting movement of the cage and to store up vsu'fiicientenergy from an automaticgravitating movement of the unbalanced cage to positively return it to initial position.

2. An automatic rotary dump comprising a gravity operated self dumping rotary cage, and a fly-wheel. movable with the dump and designed to positively right the .cage byvthe expenditure of energy derived from a gravitating movement oft-he cage.

3. The combination with a 'gravitating self dumping rotary dump cage, of means operable as a fly-wheel to retard the gravitating movement of the'cage and'to give off, sufficient stored energy to drive the dump to its righted position.

l. In a rotary dump, a gravitating self dumping cage having a car track disposed off center therein, anda fly-wheel driven by the dump, as vand for the purposes de scribed. v i

5. In a rotary unbalanced self dumping cagehaving a car track therein, trunnion wheels on which, the cage rides and"flywheels driven by the trunnion wheels and capable of storing suficient energy from a gravity movement of the cage to right the cage.

6. In a rotary dump, a cage having a' car track therein disposed to unbalance it, trunnion wheels on which the cage rides with frictional engagement only as it rotates, and fiy-wheels positively driven by said trunnions and designed to right the cage by a frictional drive after the dumping operation. I

7. In a rotary dump, a cage,-car tracks therein disposed to bring the center'of grav- ,ity of the cage with "a loaded car therein ,shown, but contemplates such modifications as come within the spirit and scope of the above and to one side of the center of the cage, stop means to restrain the rotation of the dump, and fly-wheels driven by the dump and designed to store up enough-energy during a gravitating movement of the unbalanced cage to right it after the change in its center of gravity resulting from the dumping of the contents of the car.

8. In a rotary dump, an elongated cagehaving a car track disposed oil center to unbalance it and a plurality of annular tire rails adapted to rotatably support said car track, a series of trunnions on which said tire rails turn, and a series of fly-wheels driven by the trunnions and distributed substantially uniformly lengthwise of the cage.

9. In a rotary diunp, a cage mounted to rotate on roller supports, latch means to hold. the cage in initial car receiving position, means to unbalance the dump with the loaded upright car on one side and with the empty inverted car on the other side, and a fiywheel rotatable with the dump and adapted to oppose its inertia to the initial gravitatingmovement of the dump in either direction and to give out this stored energy on the reverse rotation of the dump to restore it to initial position.

10. In a rotary dump, a cage having annular tire rails on which it turns, roller supports for said rails, a pair of oppositely disposed stop lugs rigid on the sides of a tire rail, and a bifurcated pawl which straddles the rail tread and is movable to engage said lugs, as and for the purposes described.

11. In a rotary dump, an unbalanced rotary cage, a trunnion wheel on which said cage turns, and a pair of fly-wheels driven by said trunnion wheel.

12. In a rotary dump, an unbalanced rotary cage, a trunnion wheel on which said cage turns, a shaft for said trunnion wheel, bearings for shaft beyond which its ends overhang, and apair of fly-wheels driven by said trunnion wheel and mounted on the overhung ends of its shaft.

13. In combination, a pair of parallel rotary dumps, means to unbalance said dumps when loaded to cause them to gravitate in opposite directions, means to right the dumps, and a common automatic frictional brake means interposed between the dumps.

14:. In combination, a pair of parallel rotary dumps unbalanced to gravitate in op posite directions, means to right the dumps, a common brake means interposed between the dumps and comprising spring-pressed brake shoes having a rotating element of both dumps traveling between them, and projections on said element adapted to be frictionally engaged and stopped by said shoes.

' 15. In a rotary dump, a self dumping cage having means to unbalance it and cause it, when released, to rotate sufiiciently to dump the contents of a loaded car therein, roller supports for the cage, means to support the car so that itscenter of gravity when inverted will be above the axis of the cage and disposed to unbalance the cage and cause it to rotate in a reverse direction to initial position, and a number of fly-wheels connected to the roller supports and adapted both to control the speed of the dumping movement and to restore the dump to initial position.

16. In an automatic rotary dump, in combination with a fly-wheel to control the speed of the dumps rotation, means to stop the dump in a predetermined position, and means to frictionally arrestthe dump as it approaches said predetermined position.

17. In an automatic rotary dump which is unbalanced to rotate by gravity, roller supports for the dump, a fly-wheel -to control the speed of the dumps rotation, means to stop the dump, and a frictional brake means acting by wedge and spring action on the dump to slow it up before said stop means arrests it.

In testimony whereof I affiX my signature.

EDWIN J. BEST, Witness:

NOMIE WELSH. 

